I've only ever used opera house nets in dams on private property. I've only used the shrimp nets with the 1 and a half inch hole at each end in rivers, I find they collect more bait sized shrimp and yabbies because the bigger ones cant get in.

Here’s what will happen. Fisheries will grossly under calculate how many people will want the free nets. They’ll stock a few hundred at each shop. They’ll go in a few days and everyone will be crying to the tackle shop that they aren’t getting their free nets.

I’m half tempted to go buy half a dozen $3 opera house nets to get the better quality And more expensive new nets. Lol